5 MeV
10 MeV
199 MeV
168 MeV
C. 199 MeV
Stable under nuclear radiation
Corrosion resistant
Good thermal conductor
All of these
No new neutron
At least one new neutron
One new neutron
More than one new neutron
Is lighter
Is inert
Has high specific heat
Is a good conductor
Protons and neutrons in an atom
Protons and electrons in an atom
Neutrons and electrons in an atom
Protons and neutrons in a nucleus
Slow down the speed of fast moving neutrons
Control the reaction
Reduce the temperature
Extracts heat from nuclear reaction
Percentage of U₂₃₅ has been artificially increased
Percentage of U has been artificially increased
Percentage of U₂₃₄ has been artificially increased
Extra energy is pumped from outside
Boiling water
Gas cooled
Pressurised water
All of the above
Light weight atoms
Heavy weight atoms
Critical atoms
Zero weight atoms
1 MeV
2.4 MeV
4.3 MeV
7.8 MeV
Natural uranium
Enriched uranium
Pure uranium
Any type of uranium
U₂₃₃ and Pu₂₂₉
U₂₃₁ and Pu₂₃₃
U₂₃₅ and Pu₂₃₅
U₂₃₈ and Pu₂₃₉
Alpha particles
Beta particles
Thermal neutrons
Fast neutrons and gamma rays
High energy (fast) neutrons alone
Low energy (slow) neutrons alone
Either fast or slow neutrons
Medium energy neutrons
Natural uranium
Molten lead
Any form of uranium
Thorium
Enriched uranium
Plutonium
Thorium
U₂₃₅
U₂₃₄ = 0.006%, U₂₃₅ = 0.712% and U₂₃₈ = 99.282%
U₂₃₄ = 0.712%, U₂₃₅ = 0.006% and U₂₃₈ = 99.282%
U₂₃₄ = 99.282%, U₂₃₅ = 0.006% and U₂₃₈ = 0.712%
U₂₃₄ = 0.006%, U₂₃₅ = 99.282% and U₂₃₈ = 0.712%
Control temperature
Control radioactive pollution
Control absorption of neutron
Control fuel consumption
Uses graphite rods as moderator
Has powerful moderator
Has no moderator
Uses ferrite material as moderator
Coolant itself
Ferrite rod
Graphite rod
Liquid sodium metal
As basic raw material
By neutron irradiation of Uz
By neutron irradiation of thorium
Artificially
Return the neutrons back into the core
Shield the radioactivity completely
Check pollution
Conserve energy
Maximum in centre and zero at side
Maximum at side and zero in canter
Uniform throughout
Zero throughout
Lead or concrete
Lead and tin
Graphite or cadmium
Thick galvanised sheets
Electrons
α, β and γ rays
Neutron and gamma rays
None of these
Splitting
Fission
Fusion
Disintegration
U₂₃₅
U₂₃₈
Pu₂₃₉
Pu₂₃₃
Heavy water
Concrete and bricks
Graphite and concrete
Graphite
Protons in the nucleus
Electrons in the nucleus
Neutrons in the nucleus
Electrons in the atom
The most fissionable material
The basic fuel for nuclear paints
Basic raw material for nuclear plants
The material which absorbs neutrons and undergoes spontaneous changes leading to the formation of fissionable material
The original elements change into completely different elements
The electrons of the element change
The molecules rearrange themselves to form other molecules
None of the above